Difference between revisions of "SHA-1"

From The ECRYPT Hash Function Website
(State Update Transformation)
(State Update Transformation)
Line 16: Line 16:
 
     E_{i+1} &= D_i
 
     E_{i+1} &= D_i
 
\end{aligned}
 
\end{aligned}
 +
</amsmath>
  
 
=== Padding Method ===
 
=== Padding Method ===

Revision as of 15:06, 11 October 2006

1 General Description

SHA-1 is an iterated hash function.

1.1 Compression Function

The compression function takes as input a 512-bit message block and a 160-bit chaining variable, and produces a 160-bit chaining value. The compression function is described as follows:

1.1.1 Message Expansion

1.1.2 State Update Transformation

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1.2 Padding Method

1.3 Initial Value and Constants

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2 Claimed Security Margins

3 Security Anaylsis

  • Best know attack: <math>2^{63}</math> by Wang et.al.
  • Best known collision example: 64-step collision by De Canniere and Rechberger

something like: best know attack to date: kind of attack, which variant has been looked at (e.g. round-reduced), complexity, and reference to paper and abstract.

may be make here a new page with the other cryptanalysis results.